Get rid of Gulim font

[Wijono]

I got my Powerpoint 2003 file back from a Korean friend with a few edited part, all the edition was done with known Western font, i.e., Arial, but somehow invisible Gulim font is embedded in it, so that when I wanted to save that file, a warning pops up that say:

Some of your fonts cannot be saved with the presentation.

Cannot be saved: Gulim

Reason: Not installed

I have Googled all the time and could not manage to get a hint to get rid of that Gulim font out of my presentation. Any help will be highly appreciated.